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66e4a11759
adds two layers of signature checks one done by sphinx-key in ota.rs via secp256k1 another done by esp-idf via espsecure.py see docs below: https://docs.espressif.com/projects/esptool/en/latest/esp32c3/espsecure/index.html#remote-signing-using-an-external-hsm https://docs.espressif.com/projects/esp-idf/en/latest/esp32c3/security/secure-boot-v2.html#signed-app-verification-without-hardware-secure-boot https://docs.rs/secp256k1/latest/secp256k1/
Sphinx Key Factory App
The main function of this app is to write any update.bin files from the sd card to the flash of the ESP, and configure the ESP so that on the next boot, it boots the freshly written app.